Wayne Rooney scored one and Dimitar Berbatov scored two for United.
Ferdinand told ITV Sport: “It is a good result, we paid them a lot of respect after seeing their result against Celtic, where they got a good point.
“We knew it would be tough as they are well organised so we knew we would have to pass the ball well and take our chances when they came.
“It was good today that Berba got two goals to get off the mark and hopefully we can go full steam ahead now into the rest of the season.”
